Hydrometer-syringe



H. S. MARSHUTZ.

HYDROMETER SYRINGE.

APPLICATION FILED DEC. 29.1919.

' Patented Oct. 18, 1921.-

UNITED STATES PATENT OFFICE.

HERBERT S. MARSHUTZ, OF NEW YORK, N. Y., ASSIGNOR T0 AMERICAN THERMO-WARE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

HYDROMETER-SYRIN GE.

Specification of Letters Patent.

Patented Oct. 18, 1921.

To all whom it may concern:

Be it known that I, HERBERT S. MARSHUTZ, a citizen of the United States,and a resident of New York city, in the county of New Yorkand State ofNew York, have invented certain new and useful Improvements inHydrometer-Syringes, of which the following is a specification.

The invention relates to improvements in hydrometer syringes of the typecommonly employed for measuring. the density of liqui ds in electricbatteries, and for similar purposes, and one object of the invention isto provide a syringe of this character which, without undue expense inits manufacture, shall possess such features as will prevent the syringefrom rolling off from a table on which it may be placed and also protectits fragile parts from injury in case the syringe should beinadvertentlydropped on a floor or in the event that it should beroughly placed on a table or other support or otherwise be handledcarelessly.

The syringe of my invention, in its preferred form, comprises a tubulartransparent glass casing having a contracted lower section, acollapsible bulb on the upper end of said casing, a hydrometer float orelement within said casing, a plug within the lower end of saidcontracted section and a polygonal rubber or elastic plate at the lowerend of said plu and adjacent to the lower end of said section andextending laterally to a suflicient extent beyond the plane of the sidesof said casing to cotiperate with said bulb in forming a support for thesyringe when the same'is placed on a table or the like and hold thefragile .portions of the syringe out of. contact with such table,thereby saving said fragile portions against breakage, and saidpolygonal plate also serving to prevent the syringe from rolling whenplaced on a table. The bulb and polygonal plate also cooperateto preventbreakage of the fragile portion of the syringe in case the syringeshould be inadvertently dropped or carelessly handled. The afore-' saidplug and plate are perforated to receive a glass tube which projectsbelow said plate and receives a piece of tubing to be be inserted intothe batteries between the plates thereof. A

The invention will be fully understood from the detailed descriptionhereinafter presented, reference being had to panying drawings, in whichigure 1 is a vertical section of a hydrometer syringe embodying myinvention;

Fig. 2 is a top view of the same;

Fig. 3 is a transverse section through the samedtaken on the dotted line3-3 of Fig. 1, an

Fig. 4 is a vertical section showing a modified construction orformation of the plug and polygonal plate, said features being shown inFig. 4 as having been separately formed and brought together, whereas inthe construction presented in Fig. 1 the plug and plate are shown asmolded in one integral' piece of rubber.

In the drawings 10 designates the transparent tubular glass casing, 11the lower contracted section of said casing and integral therewith, 12the collapsible bulbv on the upper end of said casing, 13 the usualhydrometer float or element within said casing, 14 a plug, preferably ofrubber, closely fitting within the lower end of said contracted sectionof said casing, and 15 a plate of polygonal or irregular edge outline atthe lower end of said plug and extending laterally beyond the plane ofthe sides of said casing and preferably to the plane of the sides ofsaid bulb, as denoted by the line 16 in Fig. 1 and as represented inFig. 2.

The plug 14 is preferably of rubber and formed with a centrallongitudinal opening 17 and, on its upper end, with grooves 18 radiatingfrom said opening for the passage of the liquid to and about the lowerend of the element 13.

the accom- The plate 15 is preferably integral with the plug 14, thewhole being molded in one piece of yielding rubber, and said plate 15has a central opening 19 alining with the opening 17 in said plug. Theplate 15 is of reasonable thickness and fiat and extends laterally atright angles from the circumferential sides of the plug 14, andpreferably said plate will be square in edge outline, although it isobvious that said plate may be of other polygonal or irregular outline.

whenever possible, arising from the dropping of the syringe or the roughplacing of the same on a table, the jar, under the circumstances, firstcoming on one of said angular portions and the syringe then rolling overuntil a flat side edge of said plate becomes, with the bulb 12, asupport for the syringe. The plug 14 will tightly fit within the lowerend of the section 11 and initially the plate 15 will be adjacent to butnot actually against said end of the said section, so that after someuse of the syringe, the plug may be advanced to an additional extentinto said section, thus taking careof the possible reduction in thediameter ,of the plug due to use and handling and also adapting myinvention to glass casings which may not be quite uniform in bore.

I insert a tube 20, preferably of glass, in the alined openings 17, 19of the plug 14 and plate 15, and this tube is of such diameter that itbecomes tightly held in position by the'engagement therewith of thewalls of said openings. The tube 20 preferably extends to the upper endof the plug, and it projects below the plate 15 and receives on itsdownwardly projecting portion a section of rubber tubing 21, which isemployed, as usual, for insertion into the liquidof the batteries.

The syringe of my invention will be made use of in accordance with knownmethods not necessary to describe. The novel fx atures of my syringereside in the plug 14 and plate 15 and the combination thereof with theother parts of the syringe, and the duties per- I may add however, towhat has been stated,

that the plug serves as a stopper for the lower' end of the casin of thesyringe and receives and holds the g ass tube 20 and that the plate 15will assuredly prevent the rollmg of the syringe off from a table orother su ort.

ile I preferably make the plug 14 and plate 15 in one integral piece, Imay make the same in two separate pieces brought together, as Irepresent in Fig. 4, in which, being a modification, I number the plug22, the plate 23, the glass tube 24 and the rubber tubing 25.

- When the plug 22 and plate 23 are brought together they may becemented to each other or not, as may be preferred, since they willremain together due to their tight fit on the glass tube 24, said tubethus serving as means for holding the plug and plate in the samerelatlon they would hear to each other if made 1n one piece as shown in'Fig. 1.

What I claim as my invention anddesire to secure by Letters-Patent,is-- 1. A hydrometer syringe comprising a tubular transparent casingcontaining a hydrometer element and having a collapsible bulb on itsupper end, an apertured plug fitting within the lower end of saidcasing, a plate of yielding material at the lower end of said plu andextending laterally beyond the plane of-the sides of said casing andhaving an irregular edge outline, and a tube extending through andtightly gripped by said plate and plug and exposed at one end to receivea flexible tube, said plate preventing the rolling of the syringe andcooperating with said bulb to support said casing free of a planesurface upon which the instrument may be placed and also to avoidfracture of said casing, and said plate having a width about equal tothe diameter of said bulb for maintaining said casing substantiallyhorizontal when the instrument is placed on a flat horizontal table.

2. A hydrometer syringe comprising a tubular transparent casingcontaining a hydrometer element and havin a collapsible bulb on itsupper end, an apertured plug fitting within the lower end of saidcasing, a plate of yielding material at the lower end of said plug andextending laterally beyond the' plane of the sides of said casing andhaving a polygonal edge outline, and a tube extending through andtightly gripped by said plate and plug and exposed at one end to receivea flexible tube, said plate preventing the rolling of the syringe andcooperating with, said bulb to suooort said casing free of a planesurface upon which the instrument may be placed and also to avoidfracture of said casing, and said plate having a w1dth about equal tothe diameter of said bulb for maintaining said casing substantiallyhOI'lzontal when the instrument is placed on a flat horizontal table.

bular transparent casing containing a hydrometer element and having acollapsible bulb on its upper end, an apertured plug fitting within thelower end of said casin a plate of yielding material at the lower end ofsaid plug and extending laterally beyond the plane of the sides of saidcasing and having an irregular edge outline, and a tube extendingthrough and tightly gripped by said plate and plug and exposed at oneend to receive a flexible tube, said plate and plug being in oneintegral piece, and said plate serving to prevent the rolling of thesyringe and to cooperate with said bulb in supporting said casing freeof a plane surface upon which the instrument may be placed and also inavoiding the fracture of said casing, and said plate having a-widthabout equal to the diameter of said bulb for maintaining said casingsubstantially horizontal when the instrument is placedon a flathorizontal table.

4. A hydrometer syringe comprising a tubular transparent casingcontaining a hydrometer element and having a collapsible bulb on itsupper end, an apertured plug fit-' 3. A hydrometer syringe comprising atuting within the lower endof said caslng, a

plate of yielding material at the lower end of said plug and extendinglaterally beyond the plane of the sides of said casing and having asquare edge outline Whose angular corner portions extend outwardlybeyond the plane of the sides of said bulb, and Which plate across itsopposite straight parallel sides has a Width about equal to the diameterof said bulb, said plate preventing the rolling of the syringe andcooperating with said bulb to support said casing free of a planesurface upon which the instrument may beplaced and also to avoidfracture of said casing, and said plate-With said bulb being adapted tomaintain said casing substantially horizontal 15 when the instrument isplaced on a fiat horizontal table.

Si ned at San Francisco, in the county of ban rancisco and State ofCalifornia, this 20th day of December, A. D. 1919.

HERBERT s. MARSHUTZ.

